Device for deburring metal strip



y 6, 1965 E. A. LAINE 3,192,834

DEVICE FOR DEBURRING- METAL STRIP Filed April 5, 1963 :s Sheets-Sheet 1 Q. E B

FIGJ

-. INVENTOR EDWARD ALAIN E ATTORNEY E. A. LAINE DEVICE FOR DEBURRING METAL STRIP July 6,19 5

3 Sheets-Sheet 2 Filed April 5, 1963 IINVENTOR EDWARD A. LAINE B w ATTORNEY y 6. 1965 E. A. LAINE 3,192,834

DEVICE FOR DEBURRING METAL STRIP Filed April 5, 1963 3 Sheets-Sheet 5 6Q 58 (D l 50 52 I 32 I 1 I I70 2 7O 5s FIG."

United States Patent 3,192,834 DEVICE FOR DEBURRING METAL STRIP Edward A. Laine, Leechburg, Pa., assignor to Allegheny Ludlum Steel Corporation, Brackenridge, Pa., a corporation of Pennsylvania Filed Apr. 5, 1963, Ser. No. 270,930 12 Claims. ((31. 9024) This invention relates to apparatus for and processing of metal strip material and more particularly to deburring strands slit from a wide strip of material.

In producing narrow strands or strips of material such as stainless steel, silicon steel and other metals, one common practice is to produce a wide strip of material which can be more easily and economically processed to the desired thickness. This wide strip is then slit into multiples of narrow strands of the desired width. The, slitting is normally accomplished with circular slitter knives which results in a thin sliver of material projecting outwardly from one side of each slit edge of the strands, these thin slivers of material being commonly referred to as burrs. These burrs project past the surface of the material and therefore must normally be removed before the strip is sold to prevent injury to people or damage to subsequent processing equipment and to afford a uniform thickness across the width of the strip so that pieces cut from the strip will stack to a uniform height. These burrs also cause ripples on the edges of the strip when the strip is wound on a reel which affects the flatness of the strip.

It is, therefore, a principal object of this invention to provide a device for removing burrs from strands of material slit from a wider strip of material.

Yet another object of this invention is the provision of a device for removing burrs from strands of material which can be used in conjunction with a slitting device to continuously remove the burrs as the strands are slit.

Still a further object of this invention is the provision of a device which is adapted to continuously deburr all of the strands of material simultaneously as they emerge from the slitting operation.

Yet another object of this invention is to provide an improved mounting for a deburring cutter which will permit facile adjustment for efficient operation.

These and other objects will become apparent from the following description when taken in conjunction with the accompanying drawings in which:

FIGURE 1 is a plan view somewhat schematic of an apparatus for deburring strip according to this invention;

FIG. 2 is an elevational view looking substantially in the direction of line II-II of FIG. 1;

FIG. 3 is an end elevational view of the deburring device of this invention;

FIGURE 4 is a sectional view looking substantially in the direction of line IVIV of FIG. 3;

FIG. 5 is a sectional view looking substantially in the direction of line VV of FIG. 4. FIGS; 6, 7 and 8 are detailed views of the mounting of the deburring cutters, and FIGS. 9, 10, 11 and l2 are detailed views of the mounting of the support bar for the cutters.

Referring now to the drawings and particularly to FIGS. 1 and 2, the device of this invention is shown in conjunction with a conventional set of slitter knives adapted to slit a wide strip of material into a plurality of narrower strips or strands S. The wide strip of material is normally in the form of a coil mounted on an uncoiler (not shown) and is drawn through the slitter knives shown schematically at 10 and pinch rolls 12 by a recoiler 16. As the wide strip of material is drawn through the slitter knives 10, the knives rotate to slit the material to the desired width. The adjustment of these slitter knives for different Widths is conventional. From the rolls 12, the

3,192,834 Patented July 6, 1965 severed strands of material are delivered to the deburring device of this invention designated generally as 14, and from thence to the recoiler 16.

The slitter knives 10 are arranged so that the burrs on opposite edges of the same strand extend in the same direction, i.e., either up or down; therefore, the burrs on alternating strands of material are directed alternately up and down. The deburring device 14 is arranged to direct the strands having their burrs extending upwardly onto an upper path of travel and the strands having their burrs extending downwardly onto a lower path of travel. The burrs are removed from these strands by the deburring device 14 and the strands are then brought back together and coiled on the recoiler 16.

Referring now to FIGS. 3 through 5, the deburring device 14 includes a support frame 18 which is bolted to the frame of the rolls 12 by bolts 13. The support frame 18 includes a pair of spaced side plates 20. The side plates 20 support bearing blocks 24 which journal an upper roll 26 and a lower roll 28. The rolls 26 and 28 are spaced and freely rotatable in the bearing blocks 24 and retained therein by slidable retainer plates 29 secured to the side plates 20. The rolls may be readily removed together with the two bearing blocks for threading strip or other access. The strands having their burrsdirected upwardly pass over the upper roll 26 and the strands having their burrs directed downwardly are passed under the lower roll 28 where the burrs are removed as will be described. The strands S are then brought back to a common path of travel by a pair of pinch rolls 30 which deliver the strands S to the recoilerlG. The pinch rolls 12 and 30 serve to hold the strands S tightly against the upper and lower rolls 26 and 28. r

An upper support beam 32 and a lower support beam 34 span between the side plates 20 and are adapted to support milling cutters designated generally as'36 adjacent the upper and lower rolls 26 and 28 for the purpose of deburring the strands as they pass the rolls 26 and 28.

A pair of generally U-shaped support brackets 38 are bolted to thetop of the side plates 20 and support the M upper support beam 32 and a pair of U-shaped support brackets 41} are also mounted to the bottom of the side plates 20 and support the lower support beam 34. The lower support brackets 40 are provided with tapped holes 42 in which are threaded adjusting bolts 43. The lower beam 34 rests on these adjusting bolts 43,and the height of the beam can be adjusted by the movement of these pair of tapped holes 45 on one leg of the U and a single tapped hole 46 on the other leg of the U (FIGURES 9 through 12). Adjusting screws 48 are threaded in these holes and bear against the beams 32 and 34 for adjustment of the rake angle of the cutters as will be described presently.

Referring now to FIGS. 6 through 8, a milling cutter is shown mounted on the upper beam 32. The other cutters on beam 32 are similarly constructed and mounted and the cutters on the lower beam 34 are similarly constructed but mounted in an inverted position to project up toward the bottom of the srtips S. Each of the cutters includes a pair of spaced side plates 50 and 52 and a pair of end plates 54 and 56 connected between the side plates 5!) and 52 by bolts 58. One end plate 54 has a tapped hole which threadably engages'a clamping bolt 60.

The other end plate 56 has a tapped hole in which is threadably secured a stationary shaft 62. A cutting head 64 having a carbide insert 66 which provides a fiat cut} In order to provide for tilting of the milling cutters to undercut the sides of the strands, milling cutters are provided with a pair of adjusting screws 70 which are threaded through the end plate 56. These screws are adjusted to select the proper angle of the milling cutter and when adjusted as shown in FIG. 7, the cutters will undercut the sides of the strand.

In setting the height of the milling cutters, the upper and lower beams 32 and 34 are removed from their respective brackets and the relative positions or" the milling cutters is obtained by loosening of the clamping bolt 61' The cutters'are positioned on the beam and the angles of their undercut adjusted by adjusting the screws 70 which also are used to adjust each to project the same distance from the beam. The clamp bolts 6% are then tightthe burrs on botn edges of each strand extend in the same direction and the burrs on adjacent strands extend alternately up and down said apparatus comprising, an upper roll adapted to divert the strands having edge burrs extending up onto an upper path of travel, a lower roll adapted to divert the strands having edge burrs extending down onto a lower path of travel, a first support member adapted to support a first set of cutters adjacent said upper roll, a second support member adapted to support a second set of cutters adjacent the lower roll, and releasable clamp means adapted to selectively position said cutters on said support members.

5. The combination of claim 4 wherein said releasable clamp means includes means to adjust said cutters to vary ened and the beams are replaced in the brackets 38 and Referring now to FIGS. 9 through 12, the distance of the cutters from the rolls 26 and 28 is adjusted by adjusting the bolts 43 and .4. The rake angle of the cutters can be adjusted on all of the upper cutters together and all of the lower cutters together by means of the adjusting screws 48 in the support brackets 38 and 40. Adjustment of these screws will allow the support bar to be tilted to allow the leading edge of the cutter to engage the incoming strands.

In positioning the cutting head 64 against the burr, it is necessary that the burr engage the cutting face 67 between the outer periphery of the cutting head and its axis of rotation. In this manner, the freely rotatable cutting head will rotate at a speed slower than the speed of the strip which w ll allow a shearing action to take place and also permit arotary movement of the cutter head during this shearing action. This rotating, shearing movement of the cutting head coupled with a journaled support roll, provides a clean, smooth out removing the burr without damage to either side of the strip.

' Although one embodiment of this invention has been shown and described, various adaptations and modifications can be made without departing from the spirit and scopeof the appended claims.

I claim:

1. Apparatus for removing edge burrs from a plurality of narow strands slit from a wide strip of metal wherein the burrs of both edges of each strip extend in the same direction and the burrs on adjacent strips extend alternately up and down, said apparatus comprising, first means adaptedto divert the strips having edge burrs extending up onto an upper path of travel, second means adapted to divert the strips having edge burrs extending down onto a lower path oftravel, a first set of cutters positioned to deburr the edges of the strips on the upper path of travel, a second set of cutters positioned to deburr the edges or": the strips on the lower path of travel, and means to selectively position said first and second sets of cutters laterally with respect to the paths of travel of the strands.

2. The combination of claim 1 further characterized by means to adjust the rake angle of the cutters.

3. The combination of claim 1 further characterized by means to adjust the cutters to undercut the edges of the strands.

4. Apparatus for removing edge burrs from a plurality of narrow strands slit from a wide strip or" metal wherein their distance from the rolls.

6. The combination of claim 5 further characterized by said clamp means including adjusting screws adapted to tilt said cutters to undercut the edges of the strip.

'7. The combination of claim 5 further characterized by adjusting screws adapted to adjust the angle of the sup port members with respect to the strands in a plane to adjust the rake angle of the cutters.

3. The combination of claim 4 further characterized by bracket means adapted to support said first and second support members for facile removal and replacement.

9. The combination of claim 4 further characterized by means to adjust the distance of the support members from their respective rolls.

it Apparatus for removing an edge burr from a moving strand of material comprising, a roll journaled for rotation and disposed to support the moving strand with the burr directed away from the roll, a circular cutting head, means rotatably supporting said cutting head adjacent said roll, and means to position said outing head to engage the burr between the cutting heads outer periphcry and its axis of rotation.

11. The combination of claim 16 wherein said means to support said cutting head includes a support beam and the means to position said cutting head includes clamping means to releasably secure said cutting head to said support beam.

12. The combination of claim 11 further characterized by said means to positioned the cutting head including adjustable set screws disposed to adjust the angle of cut of the cutting head.

References Cited by the Examiner UNITED STATES PATENTS 636,918 11/99 Mergenthaler. 1,077,969 11/ 13 Bought-on -24 X 1,585,414 *5/26 Pritchard. 2,054,311 9/36 Adams 4 90-24 2,233,724 3/41 Bannister et a1. 29-96 2,306,620 12/42 Futhey. 2,348,283 5/4-4 Dolan. 2,353,994 7/44 Chapman et al. 90-17 2,374,928 5/45 Frauenthal et al 90-17 X 2,781,698 2/57 Morton.

FOREIGN PATENTS 562,336 5/57 Italy.

WILLlAM W. DY Ell, JR, Primary Examiner. 

1. APPARATUS FOR REMOVING EDGE BURRS FROM A PLURALITY OF NARROW STRANDS SLIT FROM A WIDE STRIP OF METAL WHEREIN THE BURRS OF BOTH EDGES OF EACH STRIP EXTENDING IN THE SAME DIRECTION AND THE BURRS ON ADJACENT STRIPS EXTEND ALTERNATELY UP AND DOWN, SAID APPARATUS COMPRISING, FIRST MEANS ADAPTED TO DIVERT THE STRIPS HAVING EDGE BURRS EXTENDING UP ONTO AN UPPER PATH OF TRAVEL, SECOND MEANS ADAPTED TO DIVERT THE STRIPS HAVING EDGE BURRS EXTENDING DOWN ONTO A LOWER PATH OF TRAVEL, A FIRST SET OF CUTTERS POSITIONED TO DEBURR THE EDGES OF THE STRIPS ON THE UPPER PATH OF TRAVEL, A SECOND SET OF CUTTERS POSITIONED TO DEBURR THE EDGES OF THE STRIPS ON THE LOWER PATH OF TRAVEL, AND MEANS TO SELECTIVELY POSITION SAID FIRST AND SECOND SETS OF CUTTERS LATERALLY WITH RESPECT TO THE PATHS OF TRAVEL OF THE STRANDS.
 10. APPARATUS FOR REMOVING AN EDGE BURR FROM A MOVING STRAND OF MATERIAL COMPRISING, A ROLL JOURNALED FOR ROTATION AND DISPOSED TO SUPPORT THE MOVING STRAND WITH THE BURR DIRECTED AWAY FROM THE ROLL, A CIRCULAR CUTTING HEAD, MEANS ROTATABLY SUPPORTING SAID CUTTING HEAD ADJACENT SAID ROLL, AND MEANS TO POSITION SAID CUTING HEAD TO ENGAGE THE BURR BETWEEN THE CUTTING HEAD''S OUTER PERIPHERY AND ITS AXIS OF ROTATION. 